2.) cut a slit into the free end of the DIN connector. Peel it open, and expose all the wires.

3.) Find the Green, White, Grey, Purple, and Blue wires.
4.) Strip these wires.
5.) Connect the green wire to one of the switch terminals
6.) Connect the white wire to the other swith terminal
7.) cut one end of 3535ST off.
8.) Slit the now free end of 3535ST, and peel it back. Inside you will see two shielded wires, and one non-shielded.
9.) Strip the ends of the shieled wire.
10.) connect one of the stripped wires to the grey wire from the DIN connector.
11.) connect the other stripped wire to the purple wire from the din connector.
12.) connect the non-shielded wire to the blue wire from the din connector.
13.) Wrap it all up in electrical tape, plug both ends in and voila.

I found it easiest to melt the insulation off the wires, as they were all so thin. Just use a lighter, let it burn, then use your fingernails to peel the burned stuff off and expose the wire.

use solder on the switch. you can get away without it by using connectors availalbe at any parts store.

Use heat shrink at all wire junctions.

Enjoy

--I basically used this recipe but i wanted a clean install so i mounted the switch and a marine female headphone socket under the armrest right next to the kill switch. now i can plug in anytime i want. its not ideal as it doesn't charge and play and you can't control the iPod from the radio, but it was cheap and relatively easy. IIRC i also used a different marine grade switch i sourced from blue seas and i soldered and heat shrinked every connection. hey.. its an MC, i'm supposed to be anal. good luck.